Strainer



(No Model.)

J. W. HYATT.

- STRAINER.

No. 429,688. Patented June l0, 1890.

12 VIA Y' VIA W13 552i UNITED STATES JOHN NV. HYATT, 0F NEWARK, NEMJERSEY.

STRAINER.

SPECIFICATION forming part of Letters Patent No. 429,688, dated J' une10, 1890 Application filed October 14, 1889. Serial No. 326.980. (Nomodel.)

zen of the United States, residing at Newark, Essex county, New Jersey,have invented certain new and useful Improvements in Strainers, fullydescribed and represented in the following specification and theaccompanying drawings, forming a part of th c K The object of thisinvention is to furnish a simple and effective means of removing from afil ter-strainer the obstructions that may find entrance into thestrainiiig-aperturesg and the invention consists, primarily, in a spi`al coil of wire provided with means for twisting the coils upon oneanother.

The invention will be understood by reference to the annexed drawings,in which Figure l is a vertical section at the center of a filtercontaining a granular filter-bed with one of my improved strainers inthe bottom oll the same. rlhe parts hatched are in section upon thecenter line of the iilter, and the strainer is shown not in section, asit is located at the farther side of the center line, and it will beunderstood that the nearer side of the filter, which is removed, wouldcontain one or more similar strainers, as anynumber of such strain-` ersmay be inserted within the filter. lrig. l is a central longitudinalsection at the points where hatched of the strainer-coil and itsattachments, the view being brel/*en in the middle for want of room andthe internal supporter not being in section; and Fig. 3 is a transversesection of the strainer on line a: :t in Fig. 2.

A is the filter-casing, which would be provided with a granularfilter-bed of suitable depth, as to the dotted line l.

C is an inlet-pipe for impure water.

s is the coil of the strainer, secured, as by brazing or solder, at eachend inside ot heads e and e', the latter being of tubular form, attachedby flange f to the side of the casing A, and the interior of the headbeing connected with an outlet-cock G for admitting iluid to and fromthe interior of the strainer. The head c closes one end of the strainer,and is attached to a stein 71 extended outside the casing by astuffing-box t', and provided at its outer end with a square shank j forturning the stem.

A supporter formed as a ribbed bar 7e is inscrted within the strainer tohold the coils in a straight line between the heads, and the coils arein practice wound with an intervening space adapted to permit thepassage of the luid without permitting the escape of the granularmaterial from the [liter-bed. ln liltering, the water is admitted by thepipe C and escapes by the cock G, passing downwar through the filter-bedand entering the interstices between the coils the strainer and escapingthrough the head e.

o clean the intersticesin the strainer when clogged, the stem h isoscillated at intervals by applying a wrench or handle to the end ,7 andtwisting the coils of the strainer, which has the eiect of causing theseveral coils to slide past one another, and thus displace theobstructions temporarily lodged within the saine.

ln cleansing the filter-bed a cock D at the top of the casing is openedand a reverse current is directed through the cock G into the strainerby means lready well known in cleansing filters. Such reverse currentdisintegrates the filter-bed and removes the sediment from the upperportion of the same, washing it away through the waste-pipe D. 'lhecleaning of the interstices in the strainer is performed much moreeffectively by twisting the coils during the reversal of the watercurrent, as such current operates immediately to remove the obstructionswhen dislodged from the coils by .the twisting of the same. The coilsmay, however-also be twisted vfrom time to time during the filteringoperation with advantage, as the movement of the coils serves todislodge more or less of the obstructions that may gain entrance to theinterstices.

The coils may be made of any desired size of wire and in any diameter,with interstices of any desired width; but l find in practice that coilswound substantially close together permit the passage of a large volumeof fluid and wholly exclude the finest iiltering material. rlhe ends ofthe coil may be secured outside of the heads, if preferred, and fastenedthereto by any species of clamp or connection, and the means ofsustainin g and twisting the coil are not material, as the essentialpart of my invention is the combination, with the vcoil, of means fortwisting one end in relation to the other, to cause a variation in theTOO interstiees between the oeils, and the of the eoils past one anotherto dislodge any obstructions that may he caught therein.

An internal supporter of any suitable form to permit the longitudinalpassage of the iiuid to the outlet-dread may be used where thedimensions of the strainer require it; but the coils perform theirstraining function without regard to suoh supporter.

Any number ol strainers constructed with my improvement may be employedin iiltering in eonneotion withasuitable easingof any form, and the coilmay operate as a strainer' by introducing the Unid within the same anddischarging' it from the exterior in ease suoli an arrangement bedesirable, as the function ol' the eoils when intereepting theimpurities and in sliding; upon one another to dislodge the obstructionswould lne the same in such ease as in the vonslruetion described above.

lla-vingl thus set forth my inveni ion, what I claim herein isl. ln astrainer, the combination, with a lspiral eoil ol' wire` of' a tubularconnection to the interior ol' the eoil l'or the passage of fluid andmeans for twsting'one end of the eoil in relation to the other,substantially herein set forth.

2. In a strainer, the combination, with a spiral eoil of wire, of afixed head secured at one end thereof, a rotary head afiixed to theother end of the coil, and a water-connection to one of the heads forthe passage of finid, substantially as herein set forth.

In a strainer, the combination, with a spiral coil of Wire, of a fixedhead secured at one end thereof, a rotary head affixed to the other endof the eoil, an internal supporter' forming longitudinal passages withinthe coil, anda water-eonnection to one of the heads for the passage offluid, substantially as herein set forth.

i. The combination, with a filter-easing oontaining a granularIilter-bed, of a spiral wire coil sustained Wi thin the bed, a fixedhead seeured at one end of the coil, with a tubular water-oonneetionprojeetimgr outside the easing, and a rotary head fixed to the other endof tlf: 7l, ith a stem projecting outside of the easingto twist thecoil, as and for the purpose set ii'orth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN W. I IYAT'I. W itnesses: n

Tiros. S. CRANE, L. LEE.

